Improvement in adjustable reamers



A. SHEDLOGK. Adjustabl e Reamers.

Patented May 20,1873...

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AM H1070 -L mm GRAPH/CV00 N X(0ss uklva's PROCESS) UNITED STATES ALFRED SHEDLOOK,

PATENT 'OEEIoE.

OF NEW YORK, N. Y.

IMPROVEMENT IN ADJUSTABLE REAMERS.

Specification forming part of Letters Patent No. 139,087, dated May 20, 1873; application filed August 7, 1872. I

To all whom it may concern:

Be it known that I, ALFRED SHEDLooK, of the city of New York, county and State of New York, have invented an Improved Adjustable Reamer and Counter-Bore, of which the following is a specification:

The nature of this invention consists, first, in so constructing and arranging the parts of an adjustable reamer that the cuttingedges extend right to the end of the reamer second, in the combination of peculiarly-constructed screws and nuts for adjusting the blocks, having the cutting-edges formed thereon, and holding them firmly on the body of the reamer when so adjusted; third, in forming cutting-edges on the ends of the blocks, so that the tool may be used as a counter-bore by putting on the long head of the adjustingscrew collars, made of such size as to fit the holes to be counterbored; fourth, in making blocks-having the cutting-edges formed thereonof different sizes fit the same mandrel or body of the reamer, and, as each pair of cutters will adjust a quarter of an inch or more, it is obvious that a reamer with four pairs of cutters will take the place of sixteen standard reamers, varying by the one-sixteenth of an inch, besides being adjustable to any size between the standard sizes of reamers.

To more particularly describe my invention I will refer to the accompanying drawing of a two-inch reamer and counter-bore, forming part of this specification, in which Figure 1 is a View of my improved reamer with the collar on, forming the steady-pin when used as a counter-bore. Fig. 2 is a longitudinal section of the same. Fig. 3 is an end view with the collar removed. Fig. 4 is a cross-section through the line A A, showing the cutters expanded to their full extent; and Figs. 5 and 6 are detached views of the adjusting-blocks, having the cutting-edges formed thereon.

The part of the reamer a forming the shank is round, and is provided with a square end for the purpose of holding the tool with a wrench; the other end is formed with fiat surfaces on either side for about four inches of its length, and also with two parallel inclined surfaces, c a ,on the top, and two,a a

on the bottom, as shown in the section at Fig. 2. The two blocks b b are each made with a groove to fit over the sides of the body of the reamer, the bottoms of the grooves being made to conform to and fit on the inclined surfaces a a and a a so that by moving them along toward the shank a they ride up on these inclines and are separated more or less, the reverse taking place upon moving them back toward the end. Each of the blocks b b is provided with two outtin g-edges, c c c 0, extending the whole length of them, said cutting-edges being continued across the forward ends of the blocks, as shown at Fig. 3. The adjusting-screw dis fitted into the end of the body of the reamer and operates the nut e, which works in a slot made through the forward inclined surfaces; the screw d is prevented from working loose from the body of the reamer by the pin 01, which fits in a groove turned round the forward bearing of the screw. From the nut 0,

project the two screws 0 e, which pass through the blocks I) and l), and when the nut, e is moved along by turning the screw d, the blocks 1) I) move with it, and so their adjustment is accomplished; the blocks are then held in position by the countersunk nuts f f fitting on the screws 0 e, and by the screw 9, which passes through the block b and through a slot made in the body of the reamer, andscrews into the block b. The screw d is provided with a long head, for the purpose of holding the collar h when the tool is to be used as a counter-bore, the collar being made to fit the hole it is desired to counterbore. The screw it in the collar h is for the purpose of holding it on the head of the screw (1, or it may be held by any other suitable means.

By making the blocks with the cutting-edges formed with teeth, as in ordinary taps, the tool may be used to advantage as an adjustable tap. By removing the retaining-pin d of the screw (1, the screw may be taken out after the cutters are adjusted and secured, enabling the tool to be used as a bottoming-reamer-that is, for the purpose of reaming out a'hole which does not pass entirely through the metal.

What I claim is 1. The two blocks 1) and I) having the cutting-edges formed thereon, capable of being adjusted on the body of the reamer a, conin combination with the collar h, forming the structed and operating substantially as desteadypin when it is desired to use the 1;)01

scribed. as a counter-bore.

2. The screw d and nut e,with itsscrews ALFRED SHEDLOGK. c c and nuts, in combination with the blocks b and b and body of the reamer, substan- Vitnessesz. tially as described. WILLIAM SHEDLocK,

3. The adjustable reamer as before claimed, GURDON GONKLING, Jr. 

